US3911441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipurpose antenna system for a submarine
Assignee: TDK Micronas GmbH
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Filing: 1973-10-09
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Granted: 1975-10-07
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Expires: 1993-10-09
Abstract
Abstract There is disclosed herein a multipurpose antenna system for a submarine having a hollow mast capable of movement into and out of a submarine hull. A first antenna system is mounted at the top of the mast with this first antenna system being capable of transmitting and receiving in a time shared relation a radar signal and a satellite communication signal. A second antenna system is disposed in the mast below the first antenna system. This second antenna system is capable of receiving an electronic countermeasure signal. The second antenna system includes a plurality of different antennas disposed in spaced relation with respect to each other about the circumference of a transverse cross-section of the mast. The plurality of different antennas are flush mounted with respect to the outer surface of the mast. Each of the plurality of different antennas of the second antenna system employs two printed circuit spiral antennas stacked in the same plane one above the other with one of the spiral antennas being responsive to right-hand circular polarization and the other spiral antenna being responsive to left-hand circular polarization. A switching arrangement is coupled to each of the spiral antennas to appropriately cause the plurality of spiral antennas to scan 360* in both left-hand and right-hand circular polarization.
Inventors
- 👤 Ira S Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/28; H01Q1/00; H01Q1/27; H01Q1/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
209 words
A multipurpose antenna system for a submarine comprising: a hollow mast capable of movement into and out of a submarine hull; a first antenna system mounted at the top of said mast, said first antenna system being capable of transmitting and receiving at least a first type of electromagnetic radiation; and a second antenna system having a plurality of different antennas spaced with respect to each other and flush mounted with respect to the outer surface of said mast around the circumference of a transverse cross-section of said mast below said first antenna system, said second antenna system being capable of at least receiving a second type of electromagnetic radiation; each of said plurality of different antennas including an antenna arrangement capable of receiving left-hand and right-hand circularly polarized second type of electromagnetic radiation; said antenna arrangement including a substrate extending radially into the wall of said mast to a given point spaced from the outer surface of said mast, spiral type antenna elements printed on the surface of said substrate adjacent said given point, and a protective cover transparent to said second type of electromagnetic radiation disposed over said printed antenna elements, the outer surface of said protective cover being flush with the outer surface of said mast.
Claim 2
Dependent Claim
209 words
A multipurpose antenna system for a submarine comprising: a hollow mast capable of movement into and out of a submarine hull; a first antenna system mounted at the top of said mast, said first antenna system being capable of transmitting and receiving at least a first type of electromagnetic radiation; and a second antenna system having a plurality of different antennas spaced with respect to each other and flush mounted with respect to the outer surface of said mast around the circumference of a transverse cross-section of said mast below said first antenna system, said second antenna system being capable of at least receiving a second type of electromagnetic radiation; each of said plurality of different antennas including an antenna arrangement capable of receiving left-hand and right-hand circularly polarized second type of electromagnetic radiation; said antenna arrangement including a substrate extending radially into the wall of said mast to a given point spaced from the outer surface of said mast, spiral type antenna elements printed on the surface of said substrate adjacent said given point, and a protective cover transparent to said second type of electromagnetic radiation disposed over said printed antenna elements, the outer surface of said protective cover being flush with the outer surface of said mast.
Claim 3
Dependent Claim
25 words
A multipurpose antenna system according to claim 1, wherein said first antenna system includes a dish-shaped antenna, and a radome to protect said dish-shaped antenna.
Claim 4
Dependent Claim
21 words
A multipurpose antenna system according to claim 2, wherein said first type of electromagnetic radiation is a radar type electromagnetic radiation.
Claim 5
Dependent Claim
23 words
A multipurpose antenna system according to claim 2, wherein said first type of electromagnetic radiation is a satellite communication type of electromagnetic radiation.
Claim 6
Dependent Claim
33 words
A multipurpose antenna system according to claim 2, wherein said dish-shaped antenna is employed on a time sharing basis for said first type of electromagnetic radiation and a third type of electromagnetic radiation.
Claim 7
Dependent Claim
36 words
A multipurpose antenna system according to claim 5, wherein said first type of electromagnetic radiation is a radar type electromagnetic radiation, and said third type of electromagnetic radiation is a satellite communication type of electromagnetic radiation.
Claim 8
Dependent Claim
28 words
A multipurpose antenna system according to claim 1, wherein said first antenna system includes means to transmit and receive radar signals as said first type of electromagnetic radiation.
Claim 9
Dependent Claim
29 words
A multipurpose antenna system according to claim 1, wherein said first antenna system includes means to transmit and receive satellite communication signals aS said first type of electromagnetic radiation.
Claim 10
Dependent Claim
65 words
A multipurpose antenna system according to claim 1, wherein said first antenna system includes means to transmit and receive satellite communication signals as said first type of electromagnetic radiation for a first selected period of time and to transmit and receive radar signals as a third type of electromagnetic radiation for a second selected period of time different than said first selected period of time.
Claim 11
Dependent Claim
23 words
A multipurpose antenna system according to claim 1, wherein said second type of electromagnetic radiation is an electronic countermeasure type of electromagnetic radiation.
Claim 12
Dependent Claim
25 words
A multipurpose antenna system according to claim 10, wherein said first antenna system includes a dish-shaped antenna, and a radome to protect said dish-shaped antenna.
Claim 13
Dependent Claim
44 words
A multipurpose antenna system according to claim 11, wherein said first type of electromagnetic radiation is a radar type electromagnetic radiation, said electronic countermeasure type of electromagnetic radiation and said radar type electromagnetic radiation being processed simultaneously by said first and second antenna systems.
Claim 14
Dependent Claim
48 words
A multipurpose antenna system according to claim 11, wherein said first type of electromagnetic radiation is a satellite communication type of electromagnetic radiation, said electronic countermeasure type of electromagnetic radiation and said satellite communication type of electromagnetic radiation being processed simultaneously by said first and second antenna systems.
Claim 15
Dependent Claim
33 words
A multipurpose antenna system according to claim 11, wherein said dish-shaped antenna is employed on a time sharing basis for said first type of electromagnetic radiation and a third type of electromagnetic radiation.
Claim 16
Dependent Claim
36 words
A multipurpose antenna system according to claim 14, wherein said first type of electromagnetic radiation is a radar type electromagnetic radiation, and said third type of electromagnetic radiation is a satellite communication type of electromagnetic radiation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |